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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 144 · 40 questions
TalentJR

The fast method (Double up): × 4: double, then double again. × 8: double three times. To double a big number, double the tens and the ones separately and add: double 37 = 60 + 14 = 74.

NameDateTime takenScore ___ / 40
  1. 1.16 × 8 =
  2. 2.54 × 4 =
  3. 3.56 × 8 =
  4. 4.20 × 4 =
  5. 5.18 × 8 =
  6. 6.46 × 8 =
  7. 7.72 × 8 =
  8. 8.112 × 4 =
  9. 9.145 × 4 =
  10. 10.87 × 4 =
  11. 11.27 × 8 =
  12. 12.44 × 8 =
  13. 13.16 × 4 =
  14. 14.27 × 8 =
  15. 15.75 × 4 =
  16. 16.50 × 8 =
  17. 17.118 × 4 =
  18. 18.65 × 4 =
  19. 19.14 × 8 =
  20. 20.137 × 4 =
  21. 21.61 × 4 =
  22. 22.46 × 8 =
  23. 23.63 × 4 =
  24. 24.63 × 4 =
  25. 25.44 × 8 =
  26. 26.19 × 8 =
  27. 27.59 × 8 =
  28. 28.94 × 4 =
  29. 29.61 × 8 =
  30. 30.43 × 8 =
  31. 31.91 × 4 =
  32. 32.59 × 8 =
  33. 33.47 × 8 =
  34. 34.111 × 4 =
  35. 35.51 × 8 =
  36. 36.67 × 4 =
  37. 37.18 × 4 =
  38. 38.150 × 4 =
  39. 39.31 × 8 =
  40. 40.99 × 4 =

Answer key

  1. 128
  2. 216
  3. 448
  4. 80
  5. 144
  6. 368
  7. 576
  8. 448
  9. 580
  10. 348
  11. 216
  12. 352
  13. 64
  14. 216
  15. 300
  16. 400
  17. 472
  18. 260
  19. 112
  20. 548
  21. 244
  22. 368
  23. 252
  24. 252
  25. 352
  26. 152
  27. 472
  28. 376
  29. 488
  30. 344
  31. 364
  32. 472
  33. 376
  34. 444
  35. 408
  36. 268
  37. 72
  38. 600
  39. 248
  40. 396

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